Past

" Muzan !!! " the hashira said in unison, all their attention shifted from the two lovers to Muzan, even Shinobu who was crying, already wipe her tear and glare to Muzan.

But there are two things that they are puzzled, first how did she get here, and second, how can she stay in the sunlight, and lastly, what does she meant by her words.

" You found a cure !!? " Kagaya shouted, contrary to someone who was always gentle and calm.

For hashira, this is the the first time they heard and see that side of their master.

But, they all thought that it was because of his hatred toward Miza.

" Oh, not just I found a cure, but it also make me stronger, immune to sunlight. " she said while observing her skin, being bathed in the sunlight.

Hearing her words, Kagaya trembled.

" It's funny, right ? You and your dogs hunted me for thousand of years, but here I am in front of you, standing right in the middle of your base. While you ? You relentlessly chase me, while dying when you reach 30, because of your family curse. " she said to Kagaya/Raksha.

" What are you waiting for ?!! Your enemy leader is in front of you !!! Kill her !!! " Kagaya/Raksha shouted toward the confused hashira.

They are internally conflicted. The enemy is in front of them, but they didn't want to attack her impulsively, because there are too many information they didn't know.

" Kagaya-sama, what does Muzan mean by your the first head of the Ubuyashiki Clan ?? " instead of high spirited Rengoku, his voice are now much more serious.

" She's just bluffing, don't you want to avange your love ones ? Then all you have to do is to kill her. " Kagaya/Raksha didn't answer the fire breath user, and instead, he urge them to kill her.

" Don't you want to know what happened, humans ? " she ask.

" Me, I want to know " Allen is eagerly to know, because the event is too fast for him, and he doesn't even know the truth.

' Damn, the anime is not reliable, so many change, too many...' he thought.

Miza glare to Allen, like she was saying ' I'm not asking you '.

But she still proceeded. " Thousand years ago..."

" Stop it ! " Kagaya wanted to stop her, but his body is too weak and he falls down. The hashira didn't even try to help him, even Sanemi, the most loyal to him.

Miza look at him, and she continue. " The Ubuyashiki Clan is one of the largest Clan in the whole Japan, but for an unknown disease, all the people from the Ubuyashiki side dies in the age of 30. The current leader, Raksha Ubuyashiki search for the method to stop this unknown disease. He consult almost every famous doctor at that time, but his effort was wasted, but then, he discovered a strange flower, a flower that could make any animal or insect eat it, their lifespan will be extended. He tried to feed it to his family, but it only make them aggressive and eventually die. The Ubuyashiki member was terrified of what their leader have become, he didn't hesitate to use it on his own family, resulting for them to leave the clan. Raksha lost a ' guinea pig ' to test his research, that was when he search for people who are ' willing ' to become his subject. " Miza explained, all people present look toward Kagaya/Raksha in disbelief, they subconsciously walk away from him.

Miza took a deep breath, her eyes are a little moist. She look at her arch enemy and continued her story. " That was when he invited Kibutsuji family, my family. Being a small and normal family, of course we are happy to serve and help the Ubuyashiki Clan. But that when the nightmare began, he fed us a ' medicine ' with mixture of Wisteria Flower, together with unknown other components. My family, they become monster, they choose to end their own life rather than to become a mindless beast. Only I survive, I gained powers that human doesn't have but I also lost some on exchange. I was weak after my transformation at that time, and Raksha already made a copy of the medicine I ate, but because of his research was destroyed by my family's rampage, he made a mistake to his own ' medicine '. He only gained one ability, and it's to control other body like his own, using the ' parasite ' which his true self. " she explained.

" Then why didn't you kill at that time ? " Allen ask Miza.

Miza look toward Allen, like he was an idiot. " Are you even listening ? I was weakened at that time, I don't have a choice, but to escape, and when I regain the full strength of my body, he already founded this shitty organization to hunt me, the demon. "

" Oh, relax, relax, being angry all the time will make you old faster. " Allen said to her.

" Bastard !!! It's you who created the demons, so this all you fault. My loyalty to you is completely waste. Then I will let your life as the payment. " Sanemi immediately hold Kagaya on the collar, but before he could take his life, Kagaya already made an attempt to escape.

Between the cheeks and his vein popping head, a thin slice appeared, and just like a ' parasite ', his forehead reattach to his body run, his speed is so fast that even the wind hashira was surprise.

" No you won't. I waited this day for thousand years. I won't let you go now. " Miza said and all the people present see their surrounding change.

" Infinity castle ? " Allen ask, then he look at the Biwa ' demon ', unlike her usual hair style, the H protagonist style, her beautiful black hair are now on her back, making her beautiful face to be seen.

" So it was Nakemi's demon art. As long as she can see anyone, she can bring them inside the castle " he said feeling enlightened, because Miza suddenly appeared in the middle of the Demon Slayer Corps headquarter.

" Then where is her ' eye ' ? " he ask, then he look at his girlfriend.

" What ? Oh that, Miza wanted to learn ' human emotions ' again, and she beg me to observe our date, as a good friend of her, of course I agree, but I didn't think that it would turn out like this. " Yuechan answer.

" You're really a friend hah..." Allen was speechless.